675 research outputs found
Aspidorhinus Eichwald 1841
No full textSubgenus Aspidorhinus Eichwald, 1841 Type species: Eremias velox (Pallas, 1771)Published as part of Masroor, Rafaqat, Khan, Muazzam Ali, Nadeem, Muhammad Sajid, Amir, Shabir Ali, Khisroon, Muhammad & Jablonski, Daniel, 2022, Appearances often deceive in racerunners: integrative approach reveals two new species of Eremias (Squamata: Lacertidae) from Pakistan, pp. 55-87 in Zootaxa 5175 (1) on page 58, DOI: 10.11646/zootaxa.5175.1.3, http://zenodo.org/record/700322
FIGURE 8 in Appearances often deceive in racerunners: integrative approach reveals two new species of Eremias (Squamata: Lacertidae) from Pakistan
No full textFIGURE 8. Two rare species of the subgenus Aspidorhinus (Eremias) from desert and semi-desert areas of Central Asia (Afghanistan, Uzbekistan) for which genetic data are missing so far: the holotype of E. afghanistanica from Afghanistan (ZFMK-H 13320) and the holotype of E. regeli from Uzbekistan (ZISP 6115).Published as part of Masroor, Rafaqat, Khan, Muazzam Ali, Nadeem, Muhammad Sajid, Amir, Shabir Ali, Khisroon, Muhammad & Jablonski, Daniel, 2022, Appearances often deceive in racerunners: integrative approach reveals two new species of Eremias (Squamata: Lacertidae) from Pakistan, pp. 55-87 in Zootaxa 5175 (1) on page 77, DOI: 10.11646/zootaxa.5175.1.3, http://zenodo.org/record/700322
Decay protection of wood against brown-rot fungi by titanium alkoxide impregnations
No full textDecay resistance of pine sapwood treated with titanium alkoxide solutions was tested against the brown-rot fungi Coniophora puteana and Poria placenta for exposure times of 10 and 16 wk. In practice, wood-specimens were vacuum-impregnated by alcoholic solutions of titanium alkoxide with concentrations in the range of 5-16 mass % (solid content in solution) and subsequently cured under different humidity conditions. Results reveal that treated wood degraded up to 5% in comparison to untreated one that deteriorated 38% and 50%, respectively against both wood-decay fungi. Even full protection (mass loss below 3%) was achieved against brown rot with titanium alkoxide solution containing solid content of around 5 mass% with a weight percentage gain (WPG) of 9 mass%. With increased concentration, fungal resistance decreased slightly which was associated with more cracks and imperfections formed in the deposited layers of titanium dioxide in the adjacent wood matrix. Thermal analysis verified that a considerable amount of precursor remained in the wood structure as un-hydrolyzed organic residues. These organics, being bioactive, had the tendency to induce similar fungicidal effects as those of conventional fungicides. The amount of organic residues is correlated with the decay resistance of the tested samples. In a prolonged decay test, mass losses of 16-wk incubated samples do not show behavior different from that of the wood samples incubated for 10 wk. This result implies that the decay protection is permanent and confirms further the fungicidal activity of titanium-alkoxide-treated wood. (C) 2012 Elsevier Ltd. All rights reserved
FIGURE 7 in Appearances often deceive in racerunners: integrative approach reveals two new species of Eremias (Squamata: Lacertidae) from Pakistan
No full textFIGURE 7. (A) The type locality of Eremias rafiqi sp. nov. near Tanishpa village, Torghar Mountains, Killa Saifullah district, Balochistan; (B) Eremias rafiqi sp. nov. from Kunder, Torghar Mountains, Killa Saifullah district, Balochistan; (C) The paratype of E. rafiqi sp. nov. (PMNH 4056) from under, Torghar Mountains, Killa Saifullah district, Balochistan; (D) The type locality of Eremias killasaifullahi sp. nov. near Kunder, Torghar Mountains, Killa Saifullah district, Balochistan; (E) The holotype of E. killasaifullahi sp. nov. (PMNH 3613) from Kunder, Torghar Mountains, Killa Saifullah district, Balochistan; (F) Eremias killasaifullahi sp. nov. from Tanishpa.Published as part of Masroor, Rafaqat, Khan, Muazzam Ali, Nadeem, Muhammad Sajid, Amir, Shabir Ali, Khisroon, Muhammad & Jablonski, Daniel, 2022, Appearances often deceive in racerunners: integrative approach reveals two new species of Eremias (Squamata: Lacertidae) from Pakistan, pp. 55-87 in Zootaxa 5175 (1) on page 76, DOI: 10.11646/zootaxa.5175.1.3, http://zenodo.org/record/700322
Reducing copper leaching from treated wood by sol-gel derived TiO2 and SiO2 depositions
No full textThe antileaching efficacy of sol-gel-derived TiO2-and SiO2-based precursors has been evaluated through laboratory leaching trials with pine sapwood in two different ways. In a one-step process, wood was vacuum impregnated by the precursor solutions containing CuCl2. The copper (Cu) emission rates of the sol-gel-based impregnated woods were up to 70% lower than that of wood treated with pure CuCl2 solution at the same level of concentration. More improvement (80%) could be achieved in a two-step process, in which sol-gel precursors were introduced into an already CuCl2-treated wood. The refinement was attributed to several effects. In the one-step approach, Cu was embedded in the TiO2/SiO2 gels formed in the wood texture. During a two-step impregnation, gel layers that were formed in the wooden interior acted as an effective diffusion barrier. The sol-gel impregnations made wood more hydrophobic; therefore, the low amount of water that penetrated the cell wall was less efficient to leach out Cu
Fire retardancy of sol–gel derived titania wood-inorganic composites
No full textSol-gel technology was applied in tailoring novel wood-made-inorganic composites with improved thermal and fire properties. In practice, composites materials were prepared by impregnating pine sapwood wood with nano-scaled precursor solutions derived from titanium(IV) isopropoxide followed by a thermal curing process. Thermal and fire properties were evaluated by thermal analysis and cone calorimetry, whereas flammability was specified by oxygen index (LOI) and UL 94 test. Peak heat release rates were moderately reduced indicating fire retardance potential in terms of flame spread attributed to the appropriate protection layer action of the titania-based depositions. LOI (oxygen index) values of these composites were increased up to 38 vol.% in comparison to 23 vol.% for untreated wood. The flame retardancy performance depends on the fire scenario and is strongly influenced by wood loading and crack-free deposition of the titania layers inside the composite
Fire retardancy effects in single and double layered sol-gel derived TiO2 and SiO2-wood composites
No full textSol-gel derived TiO2 and SiO2-wood inorganic composites are prepared by direct vacuum infiltration of silicon and titanium alkoxide based precursors in pine sapwood in one or two cycles followed by a controlled thermal curing process. The resulting flame retardancy effect is investigated under two different fire scenarios using cone calorimetry and oxygen index (LOI). Heat release rates (HRR) especially the values for the second peak, are reduced moderately for all single layered composites. This effect is more pronounced for double layered composites where HRR was reduced up to 40 % showing flame retardancy potential in developing fires. Beside this, smoke release was lowered up to 72 % indicating that these systems had less fire hazards compared to untreated wood, whereas no meaningful improvement is realized in terms of fire load (total heat evolved) and initial HRR increase. However impressively, the LOI of the composites were increased up to 41 vol% in comparison to 23 vol% for untreated wood displaying a remarkable flame retardancy against reaction to a small flame. An approximate linear interdependence among the fire properties and the material loading as well as fire residue was observed. A residual protection layer mechanism is proposed improving the residue properties for the investigated composites
Pemikiran Syekh Muhammad Arsyad Al-Banjari tentang zakat : suntingan teks dan analisis intertekstual/ Shabir
No full text136 hal.; 24 cm
Current developments in chemistry, coordination, structure and biological aspects of 1-(acyl/aroyl)-3- (substituted)thioureas: advances Continue…
No full text1-(acyl/aroyl)-3-(substituted)thioureas are exciting structures in the fields of organic synthesis, material sciences, and biomedical research. Of particular significance is the fact that acyl thiourea derivatives have been demonstrated to be highly exceptional ligands and their coordination compounds have extensively been investigated in the synthesis of pharmaceuticals and agrochemical ingredients. Moreover, these structural motifs are enjoying the prestigious status as versatile synthons in heterocyclic syntheses. Therefore, the progress to introduce functionalization on the backbone of 1-(acyl/aroyl)-3-(substituted)thioureas is highly desirable. This account summarizes our efforts to capture recent documented achievements by various research groups.Fil: Saeed, Aamer. Quaid-i-azam University; PakistánFil: Mustafa, Muhammad Naeem. Quaid-i-azam University; PakistánFil: Zain-ul-Abideen, Muhammad. Quaid-i-azam University; PakistánFil: Shabir, Ghulam. Quaid-i-azam University; PakistánFil: Erben, Mauricio Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Química Inorgánica "Dr. Pedro J. Aymonino". Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Química Inorgánica "Dr. Pedro J. Aymonino"; ArgentinaFil: Flörke, Ulrich. Universität Paderborn; Alemani
Strong resonance interaction in 4-{4-[2-(3-dicyanomethylene-5,5-dimethyl-cyclohex-1-enyl)-vinyl]-phenoxy}-butyric acid. Structural, electrochemistry and spectroscopic properties complemented by Natural Bond Orbital and Hirshfeld surface analysis
No full textThe present investigation deals with the synthesis and characterization of (E)-4-(4-(2-(3-(dicyanomethylene)-5,5-dimethylcyclohex-1-en-1-yl)vinyl)phenoxy)butanoic acid (SLN-01) and its electrochemical and structural study. The compound SLN-01, has been characterized by UV, FTIR, and multinuclear (1H and 13C) NMR spectroscopic studies. DFT calculations were used to estimate redox potential and band gap energies of SLN-01. It's molecular and crystal structures were determined by single-crystal X-ray analysis. The compound (E)-4-(4-(2-(3-(Dicyanomethylene)-5,5-dimethylcyclohex-1-en-1-yl)vinyl)phenoxy) butanoic acid (SLN-01) was crystallized in the triclinic geometry. The Hirshfeld surface analysis was conducted to confirm the supramolecular association formed by the individual conformers and overall packing in the crystal. Natural Bond Orbital population analysis was performed to understand the electronic interactions between the donor and acceptor moieties in the molecule. The targeted compound exhibited a strong absorption at 416 nm (ε= 67,762 ± 4600 L mol−1 cm−1) with emission (λem) at 575 nm (at excitation wavelength λex= 430 nm).Fil: Shabir, Ghulam. Quaid-I-Azam University; PakistánFil: Arooj, Sama. Quaid-I-Azam University; PakistánFil: Saeed, Aamer. Quaid-I-Azam University; PakistánFil: Hashmi, Muhammad Zaffar. University Of The Punjab; PakistánFil: Hökelek, Tuncer. Hacettepe University; TurquíaFil: Erben, Mauricio Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Química Inorgánica "Dr. Pedro J. Aymonino". Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Química Inorgánica "Dr. Pedro J. Aymonino"; Argentin
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